The Impact of Long-Term Hypoxia on the Antioxidant Defense System in the Siberian Frog Rana amurensis.

The Siberian frog Rana amurensis has a uniquely high tolerance to hypoxia among amphibians, as it is able to withstand several months underwater with almost no oxygen (0.2 mg/liter) vs. several days for other studied species.

Insufficient Cold Resistance as a Possible Reason for the Absence of Darkling Beetles (Coleoptera, Tenebrionidae) in Pleistocene Sediments of Siberia.

The level of diversity and abundance of darkling beetles (Coleoptera, Tenebrionidae) is the main difference between the late Pleistocene and modern insect faunas of arid regions. In the Pleistocene assemblages they are extremely rare, whereas in the modern ones they predominate. It is assumed that the reason for their rarity in fossil entomological complexes is their lack of cold resistance.

Metabolomic Profiling Reveals Differences in Hypoxia Response between Far Eastern and Siberian Frogs.

Anoxia is a significant challenge for most animals, as it can lead to tissue damage and death. Among amphibians, the Siberian frog is the only known species capable of surviving near-zero levels of oxygen in water for a prolonged period. In this study, we aimed to compare metabolomic profiles of the liver, brain, and heart of the Siberian frog exposed to long-term oxygen deprivation (approximately 0.

Biochemical response of two earthworm taxa exposed to freezing.

Several earthworm species are known to be able to withstand freezing. At the biochemical level, this ability is based on cryoprotectant accumulation as well as several other mechanisms. In this study, we used H NMR to investigate metabolomic changes in two freeze-tolerant earthworm taxa, Dendrobaena octaedra and one of the genetic lineages of Eisenia sp.

Metabolomic Analysis Reveals That the Moor Frog Uses Both Glucose and Glycerol as Cryoprotectants.

The moor frog is one of a few amphibians that can tolerate freezing to low temperatures, up to -16 °C. In this study, we performed metabolomic analysis of the liver and hindlimb muscles of frozen and control . We found that the moor frog synthesizes glucose and glycerol in similar concentrations as low molecular weight cryoprotectants.

Biochemical Response to Freezing in the Siberian Salamander .

The Siberian salamander Dybowski, 1870 is a unique amphibian that is capable to survive long-term freezing at -55 °C. Nothing is known on the biochemical basis of this remarkable freezing tolerance, except for the fact that it uses glycerol as a low molecular weight cryoprotectant. We used H-NMR analysis to study quantitative changes of multiple metabolites in liver and hindlimb muscle of in response to freezing.

Impacts of environmental change on biodiversity and vegetation dynamics in Siberia.

Biological diversity is the basis for, and an indicator of biosphere integrity. Together with climate change, its loss is one of the two most important planetary boundaries. A halt in biodiversity loss is one of the UN Sustainable Development Goals.

Metabolic response of the Siberian wood frog Rana amurensis to extreme hypoxia.

The Siberian wood frog Rana amurensis is a recently discovered example of extreme hypoxia tolerance that is able to survive several months without oxygen. We studied metabolomic profiles of heart and liver of R. amurensis exposed to 17 days of extreme hypoxia.

Cold-Hardiness of the Common Spadefoot Pelobates Fuscus (Pelobatidae, Anura, Amphibia).

Background: Pelobates fuscus is an anuran amphibian that overwinters on land deep in soil, including regions with low sub-zero temperatures. It is not yet known if such behaviour can be explained by low cold-hardiness of the species.

Objective: To measure cold-hardiness of P.

The Siberian wood frog survives for months underwater without oxygen.

Few of the amphibian species that occur in the Subarctic and in mountains are adapted to low sub-zero temperatures; most of these species overwinter underwater. It is believed that the distribution of the species that overwinter underwater can be limited by the low oxygen levels in waterbodies covered with ice. We show that the colonisation of the coldest areas of Northern Asia (to 71°N) by the Siberian wood frog (Rana amurensis) was facilitated by a unique adaptation, the ability to survive extreme hypoxia - and probably anoxia - in waterbodies during overwintering.